{"id":98029,"date":"2019-10-31T14:04:19","date_gmt":"2019-10-31T21:04:19","guid":{"rendered":"https:\/\/lifeboat.com\/blog\/2019\/10\/evading-heisenberg-isnt-easy"},"modified":"2019-10-31T14:04:19","modified_gmt":"2019-10-31T21:04:19","slug":"evading-heisenberg-isnt-easy","status":"publish","type":"post","link":"https:\/\/lifeboat.com\/blog\/2019\/10\/evading-heisenberg-isnt-easy","title":{"rendered":"Evading Heisenberg isn\u2019t easy"},"content":{"rendered":"<p><a class=\"aligncenter blog-photo\" href=\"https:\/\/lifeboat.com\/blog.images\/evading-heisenberg-isnt-easy2.jpg\"><\/a><\/p>\n<p>EPFL researchers, with colleagues at the University of Cambridge and IBM Research-Zurich, unravel novel dynamics in the interaction between light and mechanical motion with significant implications for quantum measurements designed to evade the influence of the detector in the notorious \u2018back action limit\u2019 problem.<\/p>\n<p>The limits of classical measurements of mechanical motion have been pushed beyond expectations in recent years, e.g. in the first direct observation of <a href=\"https:\/\/phys.org\/tags\/gravitational+waves\/\" rel=\"tag\" class=\"\">gravitational waves<\/a>, which were manifested as tiny displacements of mirrors in kilometer-scale optical interferometers. On the microscopic scale, atomic- and magnetic-resonance force microscopes can now reveal the atomic structure of materials and even sense the spins of single atoms.<\/p>\n<p>But the <a href=\"https:\/\/phys.org\/tags\/sensitivity\/\" rel=\"tag\" class=\"\">sensitivity<\/a> that we can achieve using purely conventional means is limited. For example, Heisenberg\u2019s uncertainty principle in <a href=\"https:\/\/phys.org\/tags\/quantum+mechanics\/\" rel=\"tag\" class=\"\">quantum mechanics<\/a> implies the presence of \u201cmeasurement backaction\u201d: the exact knowledge of the location of a particle invariably destroys any knowledge of its momentum, and thus of predicting any of its future locations.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>EPFL researchers, with colleagues at the University of Cambridge and IBM Research-Zurich, unravel novel dynamics in the interaction between light and mechanical motion with significant implications for quantum measurements designed to evade the influence of the detector in the notorious \u2018back action limit\u2019 problem. The limits of classical measurements of mechanical motion have been pushed [\u2026]<\/p>\n","protected":false},"author":396,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[48,1617],"tags":[],"class_list":["post-98029","post","type-post","status-publish","format-standard","hentry","category-particle-physics","category-quantum-physics"],"_links":{"self":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/98029","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/users\/396"}],"replies":[{"embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/comments?post=98029"}],"version-history":[{"count":0,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/98029\/revisions"}],"wp:attachment":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/media?parent=98029"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/categories?post=98029"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/tags?post=98029"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}